I read the article and watched the video.
Honestly, from the title I expected the article to be about the IDF taking pot shots at a boy playing in the street.
The reason I queried it is that in these days of short attention spans and instant newsfeeds, people don't seem to bother actually reading things. So the headline is really, really important.
Shortly after 7 October, when quite a few threads on here were eagerly piling on to say how shit Israel and the IDF are, and how 7 October had been a long time coming, I remember a poster sharing a report about IDF soldiers raping a child at their base, with the clear implication that this was a Palestinian child. They didn't even bother reading the story themselves: it was about a teenage girl, the daughter of an IDF officer, who lived on a military base and had had sex with lots of the soldiers.
Just as that wasn't quite the story the headlines conveyed, so I think there is more to this one. Nine boys playing in the street, one (Basil) holding what seems to have been an explosive device, and (looking at the video) apparently getting ready to do something with it, while his friend across the street films it on his phone. Soldier opens fire, Basil is killed, soldier gets out and photographs the scene to capture evidence of what he was holding. Basil's friend Adam is also killed in the shooting. It is Adam's death that is being investigated as a possible war crime.
It's desperately sad, but it isn't quite the story suggested by the headline, and I don't think it is helpful to just share this sort of thing without any comment or analysis whatsoever.